fix run commands not running elf bug

Author: tas0dev

src/kernel/fs/fat/fat16.c

@@ -27,10 +27,17 @@ static int fat16_find_root_entry_bytes(struct fat16_super *sb, const char *name,
 	uint32_t sectors = ((sb->max_root_entries + entries_per_sector - 1) /
 			    entries_per_sector);
 	uint8_t *sec = (uint8_t *)kmalloc(sb->bytes_per_sector);
-	if (!sec)
-		return -2;
 	uint8_t shortname[11];
 	make_shortname(name, (char *)shortname);
+	/* Debug: log the requested shortname for lookup */
+	{
+		char dbgname[12];
+		for (int i = 0; i < 11; ++i)
+			dbgname[i] = shortname[i] ? shortname[i] : ' ';
+		dbgname[11] = '\0';
+		printk("fat16: find_root_entry looking for '%s' (orig='%s')\n",
+		       dbgname, name);
+	}
 	uint32_t first_free_off = 0xFFFFFFFF;
 	for (uint32_t s = 0; s < sectors; ++s) {
 		if (fat16_read_sector(sb, root_sector + s, sec) != 0) {
@@ -99,6 +106,7 @@ static int fat16_find_entry_in_dir_bytes(struct fat16_super *sb,
 					 uint32_t *free_off) {
 	uint8_t shortname[11];
 	make_shortname(name, (char *)shortname);
+	
 	uint32_t entries_per_sector = sb->bytes_per_sector / 32;
 	uint32_t first_free_off = 0xFFFFFFFF;
 	uint8_t *sec = (uint8_t *)kmalloc(sb->bytes_per_sector);

src/kernel/task/elf.c

@@ -51,11 +51,47 @@ int elf_run(const char *path) {
 	uint32_t size = 0;
 	int r = vfs_read_file_all(path, &buf, &size);
 	if (r != 0 || !buf || size < sizeof(Elf64_Ehdr)) {
-		if (buf)
+		if (buf) {
 			kfree(buf);
-		printk("elf_run: failed to read '%s' (err=%d)\n",
-		       path, r);
-		return -2;
+			buf = NULL;
+		}
+
+		int is_dir = 0;
+		int rr = vfs_resolve_path(path, &is_dir, &size);
+		if (rr != 0 || is_dir || size == 0) {
+			printk("elf_run: failed to read '%s' (err=%d)\n", path,
+			       r);
+			return -2;
+		}
+		buf = (void *)kmalloc((size_t)size + 1);
+		if (!buf) {
+			printk("elf_run: kmalloc failed for size %u\n", size);
+			return -2;
+		}
+		int fd = vfs_open(path, 0, 0);
+		if (fd < 0) {
+			printk("elf_run: vfs_open failed for '%s' (fd=%d)\n",
+			       path, fd);
+			kfree(buf);
+			return -2;
+		}
+		uint32_t read_total = 0;
+		while (read_total < size) {
+			int got = vfs_read(
+				fd, (void *)((uintptr_t)buf + read_total),
+				size - read_total);
+			if (got <= 0)
+				break;
+			read_total += (uint32_t)got;
+		}
+		vfs_close(fd);
+		if (read_total == 0) {
+			printk("elf_run: vfs_read returned 0 for '%s'\n", path);
+			kfree(buf);
+			return -2;
+		}
+		((uint8_t *)buf)[read_total] = '\0';
+		size = read_total;
 	}
 
 	Elf64_Ehdr *eh = (Elf64_Ehdr *)buf;